Find the unit tangent vector T and the principal unit normal vector N. r(t) = (cosh t)i + (sinh t)j + tk
A. T = 
(tanh t)i + 
j + 
(sech t)k; N = (sech t)i - (tanh t)k
B. T = - 
(tanh t sech t)i + 
j + 
(sech t)k; N = (-sech t)i - (tanh t)k
C. T = 
(tanh t sech t)i + 
j + 
(sech t)k; N = (sech2 t)i - (sinh t)k
D. T = - 
(tanh t)i + 
j + 
(sech t)k; N = (-sech t)i - (sinh t)k
Answer: A
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Solve the problem.The formula A = 
gives the approximate annual interest rate for a consumer loan paid off with monthly payments, where f is the finance charge on the loan, p is the number of payments, and b is the original amount of the loan. Find the approximate annual interest rate for an automobile loan to be repaid in 24 monthly installments if the finance charge on the loan is $721 and the original loan balance is $2080. (Round answer to two decimal places.)
A. 36.17% B. 30.39% C. 34.65% D. 33.28%
A capacitor is marked as a 41 æf. The following values are measured from a bin containing several values in æf. Calculate the mean value.
40, 42, 40, 39, 40, 42, 41, 41 a. 40.6 b. 39.7 c. 41.2 d. 40
State the degree of the polynomial equation.x3 + 7x2 - x - 7 = 0
A. 6 B. 4 C. 5 D. 3
Solve the equation.
= 5
A. 
, 
B. 6, 4
C. 2, 
D. -3, -7